chore(package): update standard to version 12.0.1

Closes #40

Author: greenkeeper[bot]

package.json

@@ -20,7 +20,7 @@
     "reshape-expressions": "^0.1.5",
     "snazzy": "^7.1.1",
     "source-loader": "^1.0.0",
-    "standard": "^11.0.1",
+    "standard": "^12.0.1",
     "sugarml": "^0.6.0",
     "webpack": "^3.3.0",
     "when": "^3.7.8"